CN103558127B - A kind of differential type oil liquid abrasive grain on-line sensor test macro - Google Patents
A kind of differential type oil liquid abrasive grain on-line sensor test macro Download PDFInfo
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- CN103558127B CN103558127B CN201310559830.3A CN201310559830A CN103558127B CN 103558127 B CN103558127 B CN 103558127B CN 201310559830 A CN201310559830 A CN 201310559830A CN 103558127 B CN103558127 B CN 103558127B
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Abstract
The invention belongs to measuring and controlling equipment technical field, disclose a kind of differential type oil liquid abrasive grain on-line sensor test macro, comprise exciting unit, stream pipe, first drive coil, second drive coil, inductive coil and detecting unit, first drive coil, inductive coil, second drive coil is fixed on stream pipe successively with one heart, and the first drive coil, second drive coil is symmetrical about inductive coil, winding direction is contrary, the number of turn is identical, the head end of one termination first drive coil of exciting unit, first drive coil tail end connects the head end of the second drive coil, the tail end of the second drive coil connects the other end of exciting unit, inductive coil is connected with detecting unit.The present invention can realize the wear particle monitoring in fluid, can carry out frequency adjustment for different abrasive particle, and easy for installation, the interference of the test not easily external environmental condition such as vibrated, electromagnetic radiation.
Description
Technical field
The present invention relates to full liquid stream metal worn particle sensor, particularly relate to a kind of differential type oil liquid abrasive grain on-line sensor test macro, belong to measuring and controlling equipment technical field.
Background technology
Fluid is likened to the blood of plant equipment, information abundant in wherein containing, and the monitoring for abrasive particle in fluid just can learn the running status of plant equipment, and the initial failure forecast for equipment has great significance.Traditional Oil Monitoring Technique mainly adopts the method for off-line, as: granule counting method, spectroscopic methodology etc., the off-line monitoring to solid impurity in oil product and oil can be realized, but its defect is: analyze again because needs first sample, not only require great effort time-consuming, cost is high, and returning of measurement result has hysteresis quality, be therefore subject to great limitation in the application of many applications.Given this, one of on-line monitoring technique research direction becoming those skilled in the art, can be divided into the large class of optical type, electromagnetic type, conductivity type and ultrasonic-type four by principle, but all still be in theoretical research stage.
Therefore, can design a kind of novel oil liquid abrasive grain on-line sensor test macro to overcome one or more defects above-mentioned, becoming those skilled in the art has technical barrier to be solved.
Summary of the invention
The present invention aims to provide a kind of differential type oil liquid abrasive grain on-line sensor test macro, easy for installation, not easily the interference of the external environmental condition such as vibrated, electromagnetic radiation, and can carry out frequency adjustment for different abrasive particle.
The present invention is achieved through the following technical solutions: this differential type oil liquid abrasive grain on-line sensor test macro comprises exciting unit, stream pipe, first drive coil, second drive coil, inductive coil and detecting unit, wherein the first drive coil, inductive coil, second drive coil is fixed on stream pipe successively with one heart, and the first drive coil, second drive coil is symmetrical about inductive coil, first drive coil is contrary with the second drive coil winding direction, the number of turn is identical, the head end of one termination first drive coil of exciting unit, first drive coil tail end connects the head end of the second drive coil, the tail end of the second drive coil connects the other end of exciting unit, first drive coil, second drive coil is driven by exciting unit, the equal and opposite in direction direction, magnetic field produced is contrary, inductive coil is connected with detecting unit.
Preferably, exciting unit comprise connect in turn single-chip microcomputer DDS, differential amplifier circuit, electric current and voltage conversion circuit and sensor excitation source, by single-chip microcomputer DDS regulating frequency parameter, exciting unit applies high-frequency alternating current to the first drive coil and the second drive coil, when not having abrasive particle to pass through, two drive coils produce the contrary magnetic field of size equidirectional, because mutual inductance can produce mutual induction electromotive force E to inductive coil
1, E
2,
E
1＝-jωM
1I（1）
E
2＝-jωM
2I（2）
E
o＝E
1-E
2＝-jω(M
1-M
2)I（3）
By
Obtain
Wherein E
ofor induction electromotive force, M
1be the coefficient of mutual inductance of the first drive coil to inductive coil, M
2be the coefficient of mutual inductance of the second drive coil to inductive coil, ω is driving source frequency, and I is exciting current, and j is imaginary unit in alternating current complex representation, N
ofor the number of turn of inductive coil,
be the average magnetic flux of the first drive coil to inductive coil,
be the average magnetic flux of the second drive coil to inductive coil.
Preferably, single-chip microcomputer DDS comprises single-chip microcomputer and DDS chip, and DDS chip is AD9850, and single-chip microcomputer is that STC10F08XE, STC10F08XE single-chip microcomputer adopts parallel bus to be connected with the interface between AD9850.
Preferably, detecting unit comprises the lock-in amplify unit, low-pass filter unit and the signal display unit that connect in turn.
Preferably, also comprise skeleton, the left outside shell of sensor, rubber ring and sensor right casing, stream pipe and skeleton be integrated together, the left outside shell of sensor, sensor right casing respectively with skeleton transition fit, between respectively rubber ring is housed.
Preferably, the left outside shell of sensor and sensor right casing are metal shell, adopt therebetween and are welded to connect.
Preferably, the first drive coil and the second drive coil internal diameter are 10mm, and external diameter radius is 20mm, and width is 2mm, and adopt diameter to be the copper cash of 0.28mm, the number of turn is 97 circles.
Preferably, inductive coil internal diameter is 10mm, and external diameter is 17mm, and width is 2mm, and the number of turn is 99 circles.
Preferably, the first drive coil, gap between the second drive coil and inductive coil are 2.5mm.
Preferably, when abrasive particle enters the first drive coil, the first drive coil is to the magnetic induction density B of central point
1for
Wherein r
afor abrasive particle radius, μ
0for permeability of vacuum, μ
rfor iron particle relative permeability is, r is internal coil diameter, and external diameter is R, m is first and second drive coil and width of induction coil, N
1for the drive coil number of turn, I electric current adopts sinusoidal ac, if center sensor is true origin, getting is axially x-axis, is just along dextrad, and getting radial is y-axis, and along being just upwards, x is abrasive particle horizontal ordinate;
If the average area S=π r of inductive coil
2, specify that along x-axis be just left, then
Second drive coil to the magnetic flux that inductive coil produces is
(6) (7) are substituted into (4) abbreviation obtain
Compared with prior art, beneficial effect of the present invention is as follows:
1, adopt electromagnetic type wear particle monitoring technology to realize the wear particle monitoring in fluid, easy for installation, be not subject to the interference of extraneous vibration;
2, ferromagnetism in fluid, inverse ferromagnetism two metalloid particle can be detected;
3, at sensor framework outer wrapping layer of metal shell, be not subject to the interference of external electromagnetic radiation;
4, give the sensor design size of optimization, the design parameter of coil, exciting unit frequency can carry out frequency adjustment for different abrasive particle.
Accompanying drawing explanation
Fig. 1 is differential type oil liquid abrasive grain on-line sensor system architecture schematic diagram of the present invention;
Fig. 2 is differential type oil liquid abrasive grain on-line sensor system principle diagram of the present invention;
Fig. 3 is the single-chip microcomputer DDS circuit diagram in exciting unit 1;
Fig. 4 is the circuit diagram of the differential amplifier circuit in exciting unit 1;
Fig. 5 is the circuit diagram of the electric current and voltage conversion circuit in exciting unit 1;
Fig. 6 is differential type oil liquid abrasive grain on-line sensor system equivalent circuit diagram of the present invention;
Fig. 7 is differential type oil liquid abrasive grain on-line sensor system cut-open view of the present invention;
Fig. 8 is the test findings figure adopting on-line testing of the present invention;
Fig. 9 is the induction electromotive force variation diagram adopting on-line testing different size abrasive particle of the present invention.
Symbol description
1---exciting unit 2---first drive coil 3---inductive coil
4---skeleton 5---second drive coil 6---stream pipes
7---the left outside shells of detecting unit 8---abrasive particle 9---sensor
The left outside shell of 10---rubber ring 11---sensor
Embodiment
In order to understand the present invention better, below by way of embodiment, the present invention will be described in detail by reference to the accompanying drawings.It should be noted that, the following examples are only that the invention will be further described in order to the use of understanding, but the present invention is not limited to these embodiments.
As shown in Figure 1, this differential type oil liquid abrasive grain on-line sensor test macro, comprise exciting unit 1, stream pipe 6, first drive coil 2, second drive coil 5, inductive coil 3 and detecting unit 7, wherein the first drive coil 2, inductive coil 3, second drive coil 5 is fixed on stream pipe 6 successively with one heart, and the first drive coil 2, second drive coil 5 is symmetrical about inductive coil 3, first drive coil 2 is contrary with the second drive coil 5 winding direction, the number of turn is identical, one termination first drive coil 2 head end of exciting unit 1, first drive coil 2 tail end connects the second drive coil 5 head end, second drive coil 5 tail end connects the other end of exciting unit 1, first drive coil 2, second drive coil 5 is driven by exciting unit 1, the equal and opposite in direction direction, magnetic field produced is contrary, inductive coil 3 is connected with detecting unit 7.
In a preferred embodiment, as shown in Figure 2, exciting unit 1 comprise connect in turn single-chip microcomputer DDS, differential amplifier circuit, electric current and voltage conversion circuit and sensor excitation source, and frequency parameter can be regulated by single-chip microcomputer DDS; Detecting unit 7 comprises the lock-in amplify unit, low-pass filter unit and the signal display unit that connect in turn.
DDS(DirectDigitalSynthesizer, i.e. Direct Digital Synthesizer) produce the sinusoidal waveform of certain frequency, through differential amplification rear drive voltage-controlled type constant-current circuit, produce sinusoidal pattern current excitation source and drive coil is encouraged.
Single-chip microcomputer DDS comprises single-chip microcomputer and the DDS chip of connection, in a preferred embodiment, DDS chip selects AD9850(Fig. 3 to show its peripheral circuits), single-chip microcomputer adopts STC10F08XE single-chip microcomputer, STC10F08XE single-chip microcomputer and the interface between AD9850 adopt parallel bus to be connected, AD9850 is arranged, use 4X4 key-press input setpoint frequency value, single-chip microcomputer calls keystroke handling program after receiving the key assignments of key-press input, input key code is converted to frequency values, and is sent to AD9850 by parallel interface.
Fig. 4 shows the differential amplifier circuit formed for core with multiple high speed amplifier chip OP07AQ of AD company.The central point exporting sinusoidal signal due to AD9850 is not 0V, therefore differential amplifier circuit is adopted to carry out differential amplification to the sinusoidal signal that AD9850 exports, respectively differential amplification is carried out to differential signal SinA-SinB and SinB-SinA, obtain the sinusoidal signal of two-way phase 90 degree, wherein a road sinusoidal signal is used for connecing voltage-controlled type constant-current control circuit, and exports with another road signal the reference signal that follow-up lock-up amplifier circuit provides two-way phase 90 ° to simultaneously.
Being illustrated in figure 5 a specific embodiment of electric current and voltage conversion circuit, in order to reduce the heating of coil, strictly will controlling the size of electric current, so voltage source will be converted into current source.Controllable voltage inputs from plug P1, converts thereof into corresponding electric current, export from plug P2 through amplifier AR1.
Be illustrated in figure 6 differential type oil liquid abrasive grain on-line sensor system equivalent circuit diagram of the present invention, its Cleaning Principle is as follows:
Exciting unit 1 applies high-frequency alternating current to the first drive coil 2 and the second drive coil 5, when do not have abrasive particle by time, two drive coils produce the contrary magnetic field of size equidirectional, due to mutual inductance, can produce mutual induction electromotive force E to inductive coil 3
1, E
2,
E
1＝-jωM
1I（1）
E
2＝-jωM
2I（2）
E
o＝E
1-E
2＝-jω(M
1-M
2)I（3）
By
Obtain
Wherein E
ofor induction electromotive force, M
1be the coefficient of mutual inductance of the first drive coil 2 pairs of inductive coils 3, M
2be the coefficient of mutual inductance of the second drive coil 5 pairs of inductive coils 3, ω is driving source frequency, and I is exciting current, and j is imaginary unit in alternating current complex representation, N
ofor the number of turn of inductive coil 3,
be the average magnetic flux of the first drive coil 2 pairs of inductive coils 3,
it is the average magnetic flux of the second drive coil 5 pairs of inductive coils 3.
As shown in Figure 7, this differential type oil liquid abrasive grain on-line sensor test macro also comprises skeleton 4(stream pipe 6 and skeleton is integrated together), the left outside shell 9 of sensor, rubber ring 10 and sensor right casing 11, first drive coil 2 and the second drive coil 5 preferably internal diameter are 10mm, external diameter radius is 20mm, width is 2mm, diameter is adopted to be the copper cash of 0.28mm, the number of turn is 97 circles, inductive coil 3 preferably internal diameter is 10mm, external diameter is 17mm, width is 2mm, the number of turn is 99 circles, first drive coil 2 and the gap between the second drive coil 5 and inductive coil 3 are 2.5mm, skeleton 4 and sensor right casing 11 transition fit, and between rubber ring 10 is housed, the left outside shell 9 of sensor and skeleton 6 adopt transition fit equally, between rubber ring 10 is housed, the line of sensor is drawn from the binding post on sensor right casing 11 top.
In a preferred embodiment, the left outside shell 9 of sensor and sensor right casing 11 are metal shell, adopt therebetween and are welded to connect, can reduce the interference of external environment.
When abrasive particle 8 enters the first drive coil 2, suppose that abrasive particle entered for the first drive coil 2 moment, the time is just 0, because abrasive particle is very little, can be similar to the superposition regarding multiple round electric current-carrying lead as, then the magnetic induction density B of the first drive coil 2 pairs of central points
1for
Wherein r
afor abrasive particle radius, μ
0for permeability of vacuum, μ
rfor iron particle relative permeability is, r is internal coil diameter, and external diameter is R, m is first and second drive coil and width of induction coil, N
1for the drive coil number of turn, I electric current adopts sinusoidal ac, and what suppose center sensor is true origin, and getting is axially x-axis, is just along dextrad, and getting radial is y-axis, and along being just upwards, x is abrasive particle horizontal ordinate.
If the average area S=π r of inductive coil 3
2, specify that along x-axis be just left, then
The magnetic flux that second drive coil 5 pairs inductive coil 3 produces is
(6) (7) are substituted into (4) abbreviation obtain
As can be seen from formula (8), induction electromotive force E
owith abrasive particle radius
with electric current I, current source frequencies omega is proportional, when parameter one timing except grit size, can pass through E
o, the size of reflection abrasive particle.In actual conditions, small-sized due to abrasive particle, the induced electromotive force signal of generation is very faint, brings very large difficulty to detection, in the present invention, by suitably regulating current source frequencies omega, can increase induced electromotive force signal.
Because abrasive particle is very little, the present invention by abrasive particle plastic packaging in thermoplastic tube, abrasive particle in simulation fluid is by the situation of sensor, Signal aspects uses oscillograph, when abrasive particle is completed enter and exit sensor time, the Signal aspects collected as shown in Figure 8, two similar waveforms with sine as we can see from the figure, left side waveform in figure, first bear just afterwards, right side waveform, after first bearing just, this is because, left side waveform is that abrasive particle enters sensor generation, and right side waveform produces when to be abrasive particle return, when sensor access oil circuit, fluid containing abrasive particle can only enter from a direction, then only can produce a kind of waveform.As can also be seen from Figure, the maximal value producing waveform is 24mv, and corresponding abrasive particle is 450um.
As shown in Figure 9, can see that varigrained abrasive particle is by voltage peak corresponding to sensor, thus can reflect the size of abrasive particle conversely, can realize the monitoring to abrasive particle in fluid from peak value.
The present invention gives the sensor design size of optimization, the design parameter of coil, exciting unit frequency can carry out frequency adjustment for different abrasive particle, original frequency is set as 107kHz, when not monitoring for little abrasive particle, can guidance panel be passed through, improve excitation frequency, realize the monitoring to little abrasive particle.
Specific embodiment described herein is only to the present invention's explanation for example.Those skilled in the art can make various amendment or supplement to described specific embodiment, or adopt similar mode to substitute, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.Although the present invention is described by above-mentioned preferred embodiment, its way of realization is not limited to above-mentioned embodiment.Should be realized that when not departing from purport of the present invention, those skilled in the art can make different changes and amendment to the present invention.
Claims (8)
1. a differential type oil liquid abrasive grain on-line sensor test macro, it is characterized in that, comprise exciting unit (1), stream pipe (6), first drive coil (2), second drive coil (5), inductive coil (3) and detecting unit (7), wherein said first drive coil (2), inductive coil (3), second drive coil (5) is fixed on described stream pipe (6) successively with one heart, and described first drive coil (2), second drive coil (5) is symmetrical about described inductive coil (3), described first drive coil (2) is contrary with the second drive coil (5) winding direction, the number of turn is identical, the head end of the first drive coil (2) described in one termination of described exciting unit (1), described first drive coil (2) tail end connects the head end of described second drive coil (5), the tail end of described second drive coil (5) connects the other end of described exciting unit (1), described first drive coil (2), second drive coil (5) is driven by exciting unit (1), the equal and opposite in direction direction, magnetic field produced is contrary, described inductive coil (3) is connected with detecting unit (7), described exciting unit (1) comprise connect in turn single-chip microcomputer DDS, differential amplifier circuit, electric current and voltage conversion circuit and sensor excitation source, by single-chip microcomputer DDS regulating frequency parameter, described exciting unit (1) applies high-frequency alternating current to described first drive coil (2) and the second drive coil (5), when not having abrasive particle to pass through, two drive coils produce the contrary magnetic field of size equidirectional, because mutual inductance can produce mutual induction electromotive force E to inductive coil (3)
1, E
2,
E
1＝-jωM
1I(1)
E
2＝-jωM
2I(2)
E
o＝E
1-E
2＝-jω(M
1-M
2)I(3)
By
Obtain
Wherein E
ofor induction electromotive force, M
1be the first drive coil (2) to the coefficient of mutual inductance of inductive coil (3), M
2be the second drive coil (5) to the coefficient of mutual inductance of inductive coil (3), ω is driving source frequency, and I is exciting current, and j is imaginary unit in alternating current complex representation, N
ofor the number of turn of inductive coil (3),
be the first drive coil (2) to the average magnetic flux of inductive coil (3),
be that the second drive coil (5) is to the average magnetic flux of inductive coil (3); When abrasive particle (8) enters described first drive coil (2), the first drive coil (2) is to the magnetic induction density B of central point
1for
Wherein r
afor abrasive particle radius, μ
0for permeability of vacuum, μ
rfor iron particle relative permeability is,
rfor internal coil diameter, external diameter is R, m is first and second drive coil and width of induction coil, N
1for the drive coil number of turn, I electric current adopts sinusoidal ac, is true origin with center sensor, and getting is axially x-axis, is just along dextrad, and getting radial is y-axis, and along being just upwards, x is abrasive particle horizontal ordinate;
If the average area S=π r of inductive coil
2, be just left along x-axis, then
Second drive coil to the magnetic flux that inductive coil produces is
(6) (7) are substituted into (4) abbreviation obtain
2. a kind of differential type oil liquid abrasive grain on-line sensor test macro as claimed in claim 1, it is characterized in that, described single-chip microcomputer DDS comprises single-chip microcomputer and DDS chip, described DDS chip is AD9850, described single-chip microcomputer is that STC10F08XE, STC10F08XE single-chip microcomputer adopts parallel bus to be connected with the interface between AD9850.
3. a kind of differential type oil liquid abrasive grain on-line sensor test macro as claimed in claim 1, it is characterized in that, described detecting unit (7) comprises the lock-in amplify unit, low-pass filter unit and the signal display unit that connect in turn.
4. a kind of differential type oil liquid abrasive grain on-line sensor test macro as claimed in claim 1, it is characterized in that, also comprise skeleton (4), the left outside shell of sensor (9), rubber ring (10) and sensor right casing (11), described stream pipe (6) and skeleton (4) are integrated together, the left outside shell of described sensor (9), sensor right casing (11) respectively with skeleton (4) transition fit, between described rubber ring (10) is housed respectively.
5. a kind of differential type oil liquid abrasive grain on-line sensor test macro as claimed in claim 4, it is characterized in that, the left outside shell of described sensor (9) and sensor right casing (11) are metal shell, adopt therebetween and are welded to connect.
6. a kind of differential type oil liquid abrasive grain on-line sensor test macro as claimed in claim 1, it is characterized in that, described first drive coil (2) and the second drive coil (5) internal diameter are 10mm, external diameter radius is 20mm, width is 2mm, adopt diameter to be the copper cash of 0.28mm, the number of turn is 97 circles.
7. a kind of differential type oil liquid abrasive grain on-line sensor test macro as claimed in claim 1, it is characterized in that, described inductive coil (3) internal diameter is 10mm, and external diameter is 17mm, and width is 2mm, and the number of turn is 99 circles.
8. a kind of differential type oil liquid abrasive grain on-line sensor test macro as claimed in claim 1, it is characterized in that, described first drive coil (2), gap between the second drive coil (5) and inductive coil (3) are 2.5mm.
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Families Citing this family (22)
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| CN104697905B (en) * | 2015-03-20 | 2017-04-05 | 桂林电子科技大学 | A kind of method for designing and oil liquid abrasive grain detection means of oil liquid abrasive grain detection sensor |
| CN105954167A (en) * | 2016-05-12 | 2016-09-21 | 绍兴文理学院 | Dual exciting solenoid type particle sensitive device adopting working condition adaptive filtering |
| CN106018217A (en) * | 2016-05-12 | 2016-10-12 | 李伟波 | Double-exciting solenoid type particle sensitive method with wave suppression |
| CN105891059A (en) * | 2016-05-12 | 2016-08-24 | 绍兴文理学院 | Double-excitation solenoid type online wear particle detection system adopting filter |
| CN106018215A (en) * | 2016-05-12 | 2016-10-12 | 绍兴文理学院 | Double-exciting solenoid type abrasion particle online detecting method with filter |
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| CN106018191A (en) * | 2016-05-12 | 2016-10-12 | 李伟波 | Double-excitation solenoid type particle detection method achieved through full-frequency-band work condition self-adaptive filtering |
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| CN105910964A (en) * | 2016-05-12 | 2016-08-31 | 绍兴文理学院 | Double-excitation solenoid type particle sensing device adopting wave inhibiting |
| CN105973776A (en) * | 2016-05-12 | 2016-09-28 | 绍兴文理学院 | Double-exciting solenoid type particle sensing method adopting working condition adaptive filtering |
| CN106018189A (en) * | 2016-05-12 | 2016-10-12 | 李伟波 | Particle sensitivity detection method using full-band variable-structure working condition adaptive filtering |
| CN108152361B (en) * | 2017-12-28 | 2021-09-21 | 爱德森（厦门）电子有限公司 | Online engine oil metal abrasive particle and temperature integrated monitoring device and method |
| CN109283119B (en) * | 2018-10-16 | 2024-03-08 | 北京信息科技大学 | Oil abrasive particle on-line monitoring inductance sensor test bed |
| CN111505726B (en) * | 2020-04-09 | 2023-03-10 | 中北大学 | Device and method for detecting pipeline liquid magnetic dissimilar medium based on symmetric magnetic excitation structure |
| CN112557260A (en) * | 2020-11-24 | 2021-03-26 | 北京信息科技大学 | Metal wear particle detection sensor and detection method based on high-permeability iron core |
| CN113029879A (en) * | 2021-03-19 | 2021-06-25 | 爱德森（厦门）电子有限公司 | Method for multi-frequency online monitoring of metal particles in oil and detection device thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5001424A (en) * | 1989-02-03 | 1991-03-19 | Product Resources, Inc. | Apparatus for measuring magnetic particles suspended in a fluid based on fluctuations in an induced voltage |
| CN201837574U (en) * | 2010-11-04 | 2011-05-18 | 燕山大学 | Wind power generation on-line oil analysis device based on magnetic conductivity |
| CN202150069U (en) * | 2011-07-29 | 2012-02-22 | 南京信息工程大学 | Direct digital synthesize (DDS) signal generator |
| CN103217365A (en) * | 2013-03-29 | 2013-07-24 | 电子科技大学 | Online oil way abrasive particle monitoring device |
-
2013
- 2013-11-12 CN CN201310559830.3A patent/CN103558127B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5001424A (en) * | 1989-02-03 | 1991-03-19 | Product Resources, Inc. | Apparatus for measuring magnetic particles suspended in a fluid based on fluctuations in an induced voltage |
| CN201837574U (en) * | 2010-11-04 | 2011-05-18 | 燕山大学 | Wind power generation on-line oil analysis device based on magnetic conductivity |
| CN202150069U (en) * | 2011-07-29 | 2012-02-22 | 南京信息工程大学 | Direct digital synthesize (DDS) signal generator |
| CN103217365A (en) * | 2013-03-29 | 2013-07-24 | 电子科技大学 | Online oil way abrasive particle monitoring device |
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